n2_asm.S

/* SPDX-License-Identifier: GPL-2.0 */
/* n2_asm.S: Hypervisor calls for NCS support.
 *
 * Copyright (C) 2009 David S. Miller <davem@davemloft.net>
 */

#include <linux/linkage.h>
#include <asm/hypervisor.h>
#include "n2_core.h"

	/* o0: queue type
	 * o1: RA of queue
	 * o2: num entries in queue
	 * o3: address of queue handle return
	 */
ENTRY(sun4v_ncs_qconf)
	mov	HV_FAST_NCS_QCONF, %o5
	ta	HV_FAST_TRAP
	stx	%o1, [%o3]
	retl
	 nop
ENDPROC(sun4v_ncs_qconf)

	/* %o0: queue handle
	 * %o1: address of queue type return
	 * %o2: address of queue base address return
	 * %o3: address of queue num entries return
	 */
ENTRY(sun4v_ncs_qinfo)
	mov	%o1, %g1
	mov	%o2, %g2
	mov	%o3, %g3
	mov	HV_FAST_NCS_QINFO, %o5
	ta	HV_FAST_TRAP
	stx	%o1, [%g1]
	stx	%o2, [%g2]
	stx	%o3, [%g3]
	retl
	 nop
ENDPROC(sun4v_ncs_qinfo)

	/* %o0: queue handle
	 * %o1: address of head offset return
	 */
ENTRY(sun4v_ncs_gethead)
	mov	%o1, %o2
	mov	HV_FAST_NCS_GETHEAD, %o5
	ta	HV_FAST_TRAP
	stx	%o1, [%o2]
	retl
	 nop
ENDPROC(sun4v_ncs_gethead)

	/* %o0: queue handle
	 * %o1: address of tail offset return
	 */
ENTRY(sun4v_ncs_gettail)
	mov	%o1, %o2
	mov	HV_FAST_NCS_GETTAIL, %o5
	ta	HV_FAST_TRAP
	stx	%o1, [%o2]
	retl
	 nop
ENDPROC(sun4v_ncs_gettail)

	/* %o0: queue handle
	 * %o1: new tail offset
	 */
ENTRY(sun4v_ncs_settail)
	mov	HV_FAST_NCS_SETTAIL, %o5
	ta	HV_FAST_TRAP
	retl
	 nop
ENDPROC(sun4v_ncs_settail)

	/* %o0: queue handle
	 * %o1: address of devino return
	 */
ENTRY(sun4v_ncs_qhandle_to_devino)
	mov	%o1, %o2
	mov	HV_FAST_NCS_QHANDLE_TO_DEVINO, %o5
	ta	HV_FAST_TRAP
	stx	%o1, [%o2]
	retl
	 nop
ENDPROC(sun4v_ncs_qhandle_to_devino)

	/* %o0: queue handle
	 * %o1: new head offset
	 */
ENTRY(sun4v_ncs_sethead_marker)
	mov	HV_FAST_NCS_SETHEAD_MARKER, %o5
	ta	HV_FAST_TRAP
	retl
	 nop
ENDPROC(sun4v_ncs_sethead_marker)